Fire-door for furnaces and the like.



.J. M. VAN DEN BERGER.

FIRE DOOR FOR FURNAGES AND THE LIKE.

APPLIGATION FILED JUNE 15, 1914.

' Patented Mar. 16, 1915.

L132fi64.

2 SHEETS-SHEET Attorneys J. M. VAN DEN BERGHE.

FIRE DOOR FDR. FURNACES AND THE LIKE.

APPLICATION FILED JUNE 15, 1914.

Patented Mar. 16, 14915.

2 SBBETS-SHEET 2.

Attorneys JACQUES M. VAN DEN BERGER, OF MbNTREAL, QUEBEC, CANADA.

FIRE-DOOR FOR FURNACES AND THE LIKE.

Application filed June 15, 1914.

To all whom it may concern Be it known that I, JACQUES M. van DEN Bnnsnn, a subject of the King of Belgium, residing at No. 615 Mount Royal avenue east, Montreal, Province of Quebec, Canada, have invented certain new and useful Improvements in Fire-Doors for Furnaces and the like; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention to be hereinafter described relates to fire doors for furnaces and the like.

In order to more clearly disclose the construction, operation, and use of the invention, reference should be had to the accompanying drawings forming part of the present application. Throughout the several figures of the drawings like reference characters designate the same parts.

In the drawings: Figure l is a front view of the door; Fig. 2 is a left side view of the same; Fig. 3 is a section on line 3-3 of Fig. 1 looking in the. direction of the arrows; Fig. 4 is a side view of the cylinder valve and Fig. 5 is a section on line 55 of Fig. 5': looking in the direction of the arrows.

The main objects of the invention are, to provide a neat, compact, durable, and efiicient door for furnaces and the can be operated manually by steam taken directly from the engine boiler, or by any other fluid pressure, as desired. This door is specially intended for use with furnaces used in connection with engine boilers, and for similar. purposes. Referring to the drawings in detail, 1 designates the side beams of the door which are grooved longitudinally to receive slidably mounted racks 2. The racks 2 are provided, at their upper ends, with inwardly directed integral pintles3 which project through slots 23in the inner faces of beams 1 and carry the upper leaf 4 of the door, which is slidably mounted between side beams 1. The lower leaf 5 of the door is secured along its lower edge, to a transverse ings 7 secured to the side beams of the door, at the outer edge and near the bottom there- Specification of Letters Patent.

like, which L bore 20 the inner end bar 6 rotated in bear-.

Patented Mar. 16, 1915..

Serial No. 845,044.

of. A segmental gear 8 is keyed on rod 6, near each end thereof and in mesh with rack 2. By this construction, when bar 6 is given a half rotation, the lower leaf 5 of the door is turned outwardly and downwardly, to a vertical position, the reverse of its original position, as indicated in Fig. 3. At the same time, gears 8 engage with racks 2 and force them upwardly thus raising the leaf 4 of the door to the position indicated by dotted lines in Fig. 1. This leaves the doorway open to its fullest extent and so places the leaves of the door as not to intergore in any way with the coaling of the On one end of rod 6 a gear 9 is keyed in mesh with a segmental gear 10 rotatably mounted on the side of the door frame. Gear 10 is normally held in lowered position by a tension spring 11 which has its upper end secured thereto and its lower end secured to the beam, mounted in a suitable groove in the outer face of the said beam. A pitman 12 has-its lower end pivotally connected to gear 10, at the center of its arc, and its upper end pivotally secured in a block 13 which is slidably operative in a guide bracket 14 secured to the outer face of side beam 1, and is integral with the lower end of a piston rod 15. Piston rod 15 is connected to a piston 16 operative in a cylin'der 17 secured to the outer face of the said frame, above purpose of raising piston 16 a specially eonstruc'ted valve is arranged at the lower end of cylinder 17, at one side thereof and communicating therewith.

The valve 18, which is 01 cylindrical shape and adapted to fit the interior of valve casing 19 snugly, is provided with an of the stem of which matches with the'outer end of a bore 21 extending through the side of the cylinder. The stem 22- of the valve projects through the center of the side of the casing 19, and has its outer ortion squared to -fit the square eye 2.3'on thelower end of a short arm 24 which is secured of a pin passed through the eye and the valvestm, or, by other suitable means. The upper end of arm 2-4 is pivotally connected bracket 14. For the lat . the direction of the arrow, in-Fig. 4, so asto theupper end of an arm 25, the lower =nd of which is pivotally connected to the outerend of a rocking beam 26 pivotally mounted in :1 lug 27 integral with bracket ll. The inner end of the beam 26 1s pivotally connected to the upper end of an arm the lower end of which is pivotally; connected to the innerend of a foot lever 29 yivotally mounted in a bracket 30 secured to the side of the doo1' frame.- The inner mid of beam 26 is normally held depressed by a tension spring 34 secured thereto and to the door casing.

A pipe 31 leads directly from the dome of he engine boiler to the center of the front lace of valve casing 19 and is provided with :1 control valve 32 which is normally kept open. A blow cit 33 is connected to the center of the under face of the valve casing. Normally, valve 18 is in such a position that the outer end of the arm of the L bore is matched with the inner end of the blow ofi' Iii}, as in Fig. 5. This efi'ectually closes the ends of pipe 31 and prevents any steam from entering cylinder 17. When it is deired to open, the door, the outer end of lever :39 is depressed. This acts, through arms 24, and 28, and beam 26 to rotate valve 18 m to match the outer end of the arm of bore '30 with the inner end of pipe 31. The steam, which is under pressure, fiows through-bores E20 and 21 into the cylinderl'l, so as to force the piston 16 up. As the piston rises the piston rod 15 also rises and acts through pitman 12 to rotate the segmental gear 10,-

which meshes with gear 9 keyed on the end of rod 6, and rotate the rod. As rod 6 1o tates, it acts to open the door, as previously described.

When the outer end of lever 29' is released, spring 34 acts, through beam 26 and arms and 2 1, to return valve 18 to its initial position, which permits the steam to escape from cylinder 17 through blow oil 33, as in Fig. 5. As soon as the steam starts to escape from cylinder 17, spring 11 acts to rotate gear 10 back to its initial position and closes the door. v

If, for any reason, it is not desired to operate the door by steam pressure, it may be connected so as to be operated directly from the foot lever. In this case, the upper end of pitman 12 is disconnected from block 13 and is connected to the inner end of lever 29, from which the lower end of arm 28 has been previously disconnected. By this connection, depressing the outer end of lever 29.

will act directly through pitman 12 to rotate gear 10 andopemthe door.

This door'is quickly and easily operated and need not be open during the whole time required for cooling, or-other purposes, but is only open momentarily. This results in the saving of a great deal of heat, as well as sparing the operator the ordeal of being needlessly exposed to the intense heat for a reached, the end of the plain segmentengages the teeth of the rack and eii'ectually prevents further movement thereof, as well as preventing any further movement of gears 8 and rod 6.

Plates 35 are secured to the side beams 1, at the top thereof, so as to extend inwardly beyond the inner sides thereof and form, with the extended inner portion of the side beams, a suitable groove or track for the travel of the upper leaf 40f the door.

It is thought that the construction, operation, and use of the invention will be clear from the preceding detailed description.

Changes may be made in the construction. arrangement, and disposition of the several parts of the invention without in air; way departing from the field and scope of'the" same, and it is meant to include all such within this application wherein only a preferred form has been disclosed.

Having thus fully described my invention, it

what I claim as new Letters Patent is:

'1; In a door of the character described, grooved side beams, racks slidably mounted in the grooves thereof, a slidable door leaf carried thereby, a transverse bar rotatably mounted on the side beams, a door leaf secured thereto along its lower edge, segmental gears keyed on the said bar in mesh with the. said racks. a gear keyed on one end of the said bar. a rotatable segmental gear 1n mesh therewith. a piston rod, means for raising the said piston rod, and connections between the said rod whereby the gear is rotated when the piston rod is raised In a door of the character described. grooved sidebeams, racks slidably mounted n the grooves thereof, a slidable door leaf carrled thereby, a transverse bar rotatably mounted on the said side beams. segmental gears keyed thereon and in mesh with the sa d racks, a gear keyed on one end of the said bar, a rotatablv mounted segmental gear in mesh therewith, a cylinder. a piston mounted therein, means for admitting fluid and desireto secure by 7 under pressure into the cylinder under the ton, connecti ns between the said segmental segmental gear and piston piston, a piston rod carried by the said pis- IJSQQEQ a gear and piston rod whereby the gear is 10- 4 In witness whereof I have hereunto set tated when the piston rod is raised, means my hand in the presence of two witnesses. for permitting the escape of the fluid from JACQUES M. VAN DEN BERGHE. the cylinder, and means for returning the Witnesses:

.3 said segmental rack to its initial position, A. BASTIEN,

when the said escape means is opened. A. Pizzocom. 

